Should you use lubricant in extreme cold? Let's do a test.

Published on January 30, 2026
Duration: 13:53

This guide details a practical test of AR-15 A2 rifle functionality in extreme cold (4°F). It compares dry, CLP-lubricated, and Rem Oil-lubricated states, including a simulated freezing water test. The findings suggest that while all rifles eventually functioned, excessive CLP can cause sluggishness in extreme cold, recommending a light coat for rust prevention and reliability.

Quick Summary

In extreme cold (tested at 4°F), excessive lubrication with products like Break-Free CLP can cause sluggishness and potentially lead to light primer strikes due to oil thickening. A light coat is generally recommended for rust prevention without hindering function.

Chapters

  1. 00:00Introduction to Cold Weather Test
  2. 00:45Test Rifles and Lubricants
  3. 03:29Firearm Preparation
  4. 07:45Initial Cold Fire Test
  5. 08:53Freezing Water Test
  6. 10:40Conclusion and Recommendations

Frequently Asked Questions

What is the effect of lubricants like CLP on AR-15s in extreme cold?

In extreme cold (tested at 4°F), excessive lubrication with products like Break-Free CLP can cause sluggishness and potentially lead to light primer strikes due to oil thickening. A light coat is generally recommended for rust prevention without hindering function.

Should you run an AR-15 completely dry in extreme cold?

While a dry AR-15 might function initially, running it completely dry in cold weather increases the risk of rust and corrosion. A light application of an appropriate lubricant is advised for both reliability and protection.

How does Remington Rem Oil perform in extreme cold compared to CLP?

In the tested conditions (4°F), Remington Rem Oil showed reliable performance, firing 10 rounds without issue after cold soaking and a freezing water test, suggesting it may be less prone to thickening than heavy CLP applications.

What is the best practice for lubricating a firearm in extreme cold?

The expert recommends a light coat of appropriate lubricant to prevent rust while ensuring the firearm's action remains free to operate. Avoid over-lubrication, which can cause malfunctions in sub-freezing temperatures.

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